Also in Bloons TD 3 are a slew of new tower upgrades. Basic Dart Monkeys can now be upgraded with razor darts, which pop three bloons instead of two. The kooky Boomerang monkey can be transformed into a glaive thrower, able to pop eight bloons per arc! Ice Balls can pop a few bloons on freeze at their highest level and Cannons can be upgraded to launch missiles that frag apart on impact.